#include "apps/demo_app.h"
#include "esp_log.h"

#define TAG "DemoApp"

esp_err_t DemoApp::init(lv_obj_t* container) {
  if (!container) {
    ESP_LOGE(TAG, "Container is null");
    return ESP_ERR_INVALID_ARG;
  }

  _container = container;
  ESP_LOGI(TAG, "Initializing demo app...");

  // Header label
  _label_header = lv_label_create(_container);
  lv_label_set_text(_label_header, "Counter & Brightness Demo");
  lv_obj_set_style_text_color(_label_header, lv_color_black(), 0);
  lv_obj_align(_label_header, LV_ALIGN_TOP_MID, 0, 20);

  // Counter label
  _label_counter = lv_label_create(_container);
  lv_label_set_text(_label_counter, "Count: 0");
  lv_obj_set_style_text_color(_label_counter, lv_color_black(), 0);
  lv_obj_align(_label_counter, LV_ALIGN_CENTER, 0, -80);

  // Increment button
  _btn_increment = lv_btn_create(_container);
  lv_obj_set_size(_btn_increment, 150, 60);
  lv_obj_align(_btn_increment, LV_ALIGN_CENTER, -100, -20);
  lv_obj_add_event_cb(_btn_increment, btn_increment_event_cb, LV_EVENT_CLICKED, this);

  lv_obj_t* label_inc = lv_label_create(_btn_increment);
  lv_label_set_text(label_inc, "+");
  lv_obj_set_style_text_color(label_inc, lv_color_black(), 0);
  lv_obj_center(label_inc);

  // Decrement button
  _btn_decrement = lv_btn_create(_container);
  lv_obj_set_size(_btn_decrement, 150, 60);
  lv_obj_align(_btn_decrement, LV_ALIGN_CENTER, 100, -20);
  lv_obj_add_event_cb(_btn_decrement, btn_decrement_event_cb, LV_EVENT_CLICKED, this);

  lv_obj_t* label_dec = lv_label_create(_btn_decrement);
  lv_label_set_text(label_dec, "-");
  lv_obj_set_style_text_color(label_dec, lv_color_black(), 0);
  lv_obj_center(label_dec);

  // Slider
  _slider_brightness = lv_slider_create(_container);
  lv_obj_set_width(_slider_brightness, 400);
  lv_obj_align(_slider_brightness, LV_ALIGN_CENTER, 0, 80);
  lv_slider_set_range(_slider_brightness, 0, 100);
  lv_slider_set_value(_slider_brightness, 50, LV_ANIM_OFF);
  lv_obj_add_event_cb(_slider_brightness, slider_event_cb, LV_EVENT_VALUE_CHANGED, this);

  // Slider value label
  _label_slider_value = lv_label_create(_container);
  lv_label_set_text(_label_slider_value, "Brightness: 50%");
  lv_obj_set_style_text_color(_label_slider_value, lv_color_black(), 0);
  lv_obj_align(_label_slider_value, LV_ALIGN_CENTER, 0, 130);

  // Info text at bottom
  lv_obj_t* label_info = lv_label_create(_container);
  lv_label_set_text(label_info, "Touch buttons and slider to test");
  lv_obj_set_style_text_color(label_info, lv_color_black(), 0);
  lv_obj_align(label_info, LV_ALIGN_BOTTOM_MID, 0, -20);

  ESP_LOGI(TAG, "Demo app initialized successfully");
  return ESP_OK;
}

esp_err_t DemoApp::deinit(void) {
  ESP_LOGI(TAG, "Deinitializing demo app");

  // All widgets will be automatically deleted when container is cleaned
  _label_header = nullptr;
  _label_counter = nullptr;
  _btn_increment = nullptr;
  _btn_decrement = nullptr;
  _slider_brightness = nullptr;
  _label_slider_value = nullptr;
  _counter = 0;

  return ESP_OK;
}

std::string DemoApp::get_name(void) const {
  return "Demo";
}

void DemoApp::btn_increment_event_cb(lv_event_t* e) {
  lv_event_code_t code = lv_event_get_code(e);
  if (code == LV_EVENT_CLICKED) {
    DemoApp* app = (DemoApp*)lv_event_get_user_data(e);
    if (app) {
      app->_counter++;
      lv_label_set_text_fmt(app->_label_counter, "Count: %d", app->_counter);
      ESP_LOGI(TAG, "Increment button clicked, count: %d", app->_counter);
    }
  }
}

void DemoApp::btn_decrement_event_cb(lv_event_t* e) {
  lv_event_code_t code = lv_event_get_code(e);
  if (code == LV_EVENT_CLICKED) {
    DemoApp* app = (DemoApp*)lv_event_get_user_data(e);
    if (app) {
      app->_counter--;
      lv_label_set_text_fmt(app->_label_counter, "Count: %d", app->_counter);
      ESP_LOGI(TAG, "Decrement button clicked, count: %d", app->_counter);
    }
  }
}

void DemoApp::slider_event_cb(lv_event_t* e) {
  lv_event_code_t code = lv_event_get_code(e);
  if (code == LV_EVENT_VALUE_CHANGED) {
    DemoApp* app = (DemoApp*)lv_event_get_user_data(e);
    if (app) {
      lv_obj_t* slider = (lv_obj_t*)lv_event_get_target(e);
      int32_t value = lv_slider_get_value(slider);
      lv_label_set_text_fmt(app->_label_slider_value, "Brightness: %d%%", (int)value);
      ESP_LOGI(TAG, "Slider value changed: %d", (int)value);
    }
  }
}

// DemoAppDescriptor implementation
DemoApp* DemoAppDescriptor::_app_instance = nullptr;

DemoAppDescriptor::DemoAppDescriptor()
  : AppDescriptor("Demo", nullptr) {
  // Create singleton app instance
  if (!_app_instance) {
    _app_instance = new DemoApp();
  }

  // Register with AppRegistry
  AppRegistry::instance().register_app(this);
  ESP_LOGI(TAG, "DemoApp registered with AppRegistry");
}

void DemoAppDescriptor::draw_icon(lv_obj_t* parent) {
  // Create a simple icon with text and a symbol
  lv_obj_t* icon_label = lv_label_create(parent);
  lv_label_set_text(icon_label, LV_SYMBOL_SETTINGS "\nDemo");
  lv_obj_set_style_text_color(icon_label, lv_color_white(), 0);
  lv_obj_set_style_text_align(icon_label, LV_TEXT_ALIGN_CENTER, 0);
  lv_obj_center(icon_label);
}